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G. A. BROWN.

ATTACHMENT FOR LIQUID VENDING MACHINES. y

APPLICATION rILED Auaflsm.

1,303,158, l lPatented May'6,1919.

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/lV VE N TOI? GEO/PGE A. BROWN* G. A. BROWN. ATTACHMENT FOR LIQUID VENDING MACHINES.

APPLICATION FILED AUILB. IQIB.

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fied construction of the overfi frame, supporting a casing bers 4, 5 and 6 GEORGE A. BROWN, OF MINNEAPOLIS, MIN

NESOTA, ASSIGNOR TO ANTHONY LIQUID VENDING MACHINE COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

ATTACHMENT` FOB LIQUID-VENDING MACHINES.

Specification of Letters Patent. l

Patented May 6, 1919.

Applicationrled August 8. 1918. 4 Serial No. 248,955.

To all whom t may concern.' y

Be it known that I, GEORGE A. BROWN, a citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Attachments for Liquid-Vending Machines, of which the following is a specification.

My invention relates to the type of vending'machine shown and described in the aplication of David 4W. Anthony for Letters Patent of the United States, filed July 11, 1918, Serial No. 244,356, and assigned to the Anthony Liquid Vending Machine Company, assignee of my improvement.

I have Afound in the operation of the vending machine described in said application that the operator by holding down the lever manipulated to operate the vending machine can prevent the overflow mechanism from checking the flow of oil and thereby obtain a much greater quantity than intended by the deposit of a single coin.

The object of my invention, therefore, is

to provide a simple attachment for this vending machine which, without adding materially to the cost of the machine, will positively prevent any user from obtaining any more liquid than the equivalent of thevalue of the coin deposited. In other words, it is impossible to beat the machine. v

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification,

Figure 1 is a vertical sectional view of the machine, showing my attachment applied thereto,

Fig. 2 is a vertical sectional view through showing the conoveriow control mechanism,

Fig. 3 is a detail sectional view ofthe Fig. 4 is a side view,

showing the ball in its upright position and taken on the line showing a modi- In the drawing, 2 represents a suitable 3 wherein chamare arranged, independently of each other for the 25, 50 and $1.00 quantity of gasolene or other liquid that is beingA Fig. 5 is a sectional view,

vended from the machine. 7 represents an auxiliary .supply tank, having a pipe connection 8 with a main gasolene supply tank, (not shown), and a pipe 9 leading from the auxlliary supply tank and communicating with a branch pipe 10 which extends to one of` the chambers in the dispensing tank above. It will be understood that there is one of these branch pipes for each chamber, the drawing, Fig. 1, indicating the connection with the dollar chamber. A valve 11 controls the flow of liquid to the pipe l() and a mechanism 12 corresponding to the mechanism shown and described in the application above referred to, operates the said valve when a coin of proper denomination ice deposited in the machine and the operating lever moved. The dollar chamber is provided with an overflow pipe 13 mounted to telescope with a pipe 14 which communicates at its lower end with a manifold 15 and similar pipes 14a and 15b communicate with said manifold and have telescoping connections with pipes 13a and 13b which extend into the chambers 5 and 4 to regulate the level of the liquid therein and conduct the overiow away from the chamber when the level rises above a certain predetermined point. By adjusting the' telescoping pipe sections virtically in the chambers, the overlow point may be varied and a greater or less quantity of liquid held in the chambers, according to the fluctuations in the price thereof, due to variations in quality and changes of the market.

pipe connection with the lower walls of the manifold 15 and within this casing is an overflow cup 17 to which the overflow liquid running vdown through the telescoping pipe is delivered.

A weighted arm 18 is mounted to oscillate in a vertical plane and provided with projecting lugs 18 and 18" upon opposite sides of the depending end 18a of a T-shaped cam member 18h, which is centrally pivoted and provided with cam surfaces vpositioned to contact with the stem 18c of an air controlling valve through which air is admitted to the auxiliary supply tank from the pipe 19. A bar 19 is connected with said weighted arm for raising it to the position shown in Fig. 1 and admitting air to the auxiliary supply tank when the valve leading to the dispensing tank chamber is opened to admit the liquid fuel to that chamber. If the operator releases the crank A Caslngy 16 has a' overflow to the and rock shaft forming part of the mechanism 12 when the coin has been deposited in the machine, then when the chamb'er in the dispensing tank is full the overflow entering the manifold 15 from the chamber will pass down into the cup 17 and depress it sufciently and rock the shaft 20 having the hub 21 thereon provided with a shoulder 22 to engage a similar shoulder on the hub of the weighted arm 18 and return said arm to its normal position. During this return movement the cam 18"v will be operated and the stem 18d of the exhaust valve 22 will be engaged by said cam to open the valve 22 to the exhaust and close the liquid inlet valve and the bar 28 will be withdrawn from the path of the weighted arm, allowing said arm to swing to its normal horizontal position. In case, however, the operator does not release the crank shaft and the oil overflows, for instance, in the 25e chamber and the overflow cup is prevented from per orming its function the accumulation of the overflow in the manifold 15 will-rise into the 50c and $1100 chambers and will flow out of these chambersthrough their connection with the delivery pipe 23 so that by the deposit of a single coin the user may obtain liquid up to the level of the overflow in the three chambers and obviously this would completely destroy the value of the machine for vending purposes.

To obviate this objection to the machine of the Anthony application as above de-` scribed, I provide a by-pass pipe 24 communicating with the manfold 15 above the overflow cup 17 and leading around the ipe 25 which connects the overflow cu wit the supply pipe 8. When, therefore, t e user of the machine fails to release the operating crank so that when the chamber contains the equivalent in value of liquid for which he has 'deposited a coin and the overflow cup is held against depression, the accumulation of the overflow in the other chamber will flow down through the pipe 24 back to the supply tank and the user, when he finally releases the crank, will obtain only as much liquid fuel as corresponds` in value to the coin he has deposited in the machine. In other words, although he may prevent in some way the normal automatic action of the overflow mechanism to shut off the delivery of liquid to the dispensing chamber and open the supply tank to the exhaust, he will, nevertheless, only obtain as much fuel as he has paid for and will not receive that in the delivery pipe until he has released the operating lever and allowed the mechanism connected withthe overflow cup to operate.

In Fig. 5 I have shown a modified construction of the overflow cup which consists in providing any overflow opening 17 therein, inclosed by a wall 17" and open at the top so that when the cup is filled the liquid, instead of running back into the dispensing chambers, will overiow through the opening 17 and pass down through the pipe 25 back to the supply tank. This, or" course, will only occur in case the overflow cup is held by some means against its normal depression by the weight of the liquid when the dispensing chamber has been filled. In other respects the operation of this modified construction will be the same as described with reference to the previous figures.

It will be noted in l? ig. 1 that the by-pass pipe 24 is connected with the upper walls of the manifold so that the normal overflow into this manifold and the overflow cup will not enter this by-pass pipe until the cup and the manifold have been filled and the fall of the overflow cup is prevented either by the user holding the operating crank or in case there should be some obstruction to the movement of the cup and the mechanism actuated thereby.

I claim as my invention:

1. The combination, with a liquid supply tank, of a dispensing tank having a plurality of chambers therein, and discharge openings 'for said chambers, an inlet pipe leading from said supply tank and having branch pipes communicating respectively with the chambers of said dispensing tank, valves normally closing the passages to said branch pipes, means for admitting air pressure to sa1d supply tank, and o ning one of the valves in said branch pipes, and overflow mechanism actuated through the rise of the liquid in said chambers above a predetermined level for closing the air inlet to said supply tank and the valve in said branch pipe, and a by-pass pipe communicating with said chambers through said branch pipes and leading around said overflow mechanism to said supply tank for returning the overflow to said supply tank should said overflow mechanism fa1l to operate.

2. The combination, with a dispensing tank having chambers therein, overflow pines projecting into said chambers, a manifold communicating with said pipes, an overflow casing communicating with said manifolds, a cup within said casing, mechanism actuated by the depression of said cup under the weight of the overflow for checking the delivery to said dispensing tank, and means for returning the overflow from said manifold to the supply tank should said cup fail to operate.

3. In a liquid vending machine, a dispensing tank having chambers therein and supply and discharge openings, overflow pipe projecting into said chambers, an overflow manifold communicating with said pipes, an overflow casing communicating with said manifold, a cup provided in said casing,

overiiow from said pipe to the supply tank mechanism actuated through the'movement of said cup under the Weight of the overflow for checking the delivery of liquid to said tank, and a pipe communicating With the upper Walls of said manifold and leading around said overflow casing and cup for, returning the overflow to the supply tank should said cup fail to operate.

4. lThe combination, with a dispensing tank having a plurality of chambers therein and means for delivering the liquid to be dispensed to said chambers, of overflow pipes projecting into said chambers, mechanism actuated by the liquid'lowing through said overow pipes when a predetermined level has been reached in said chambers for automatically shutting off the further delivery of liquid to said* chambers, and means connected With said overflow pipes for returning the overflow tothe supply tank in case said shutting-ofi mechanism should fail to operate. 4

5. The combination, with a liquid sup ly tank, of a dispensing tank having a chamber therein, an overflow pipe proJecting into said chamber, an overflow casing communi eating with said pipe, a cup Within said casing, mechanism actuated by the depression of said cup under theweight of the overflow for checking the delivery to said dispensing tank, and means for returning the should said overflow cup fail to operate..

6. The combination, with a liquid supply tank, of a dispensing tank having a chamber therein and a discharge openingv therefor, an inlet pipe leading from said supply tank to said chamber, an overflow pipe projectinginto said chamber, mechanism actuated by the overflow of the liquid into said overilow pipe for shutting oli' the flow of liquid to said chamber, and means for returning the overiiow to said supply tank should said overflow mechanism fail to operate.

7 The combination, With a liquid supply tank, of a dispensing tank having a plurality of chambers therein and a pipe connection -with saidsupply tank, overioW pipes projecting into said chambers, a manifold com municating with said pipes, mechanism actuated bythe overliovv in vsaid pipes for checking the delivery to said dispensing tank, and means foi-returning the overflow `from said manifold to the supply tank should said mechanism fail to operate.

8. The combination, with a liquid supply tank, of a dispensing tank having a discharge port, an inlet pipe leading from said supply tank to said'dispensing tank, said dispensing tank having an overflow opening, mechanism actuated by the overflow of the liquid into said opening for shutting off the ilow of liquid to said dispensing tank,

and means for returning the overflow to said supply tank should said mechanism fail to operate.

In witness whereof I have lhereunto set my hand this 2d day of August, 1918.

GEORGE A. BROVN. 

